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PatchSiren cyber security CVE debrief

CVE-2026-25874 Hugging Face CVE debrief

LeRobot through 0.5.1 contains an unsafe deserialization vulnerability in the async inference pipeline where pickle.loads() is used to deserialize data received over unauthenticated gRPC channels without TLS in the policy server and robot client components. This vulnerability allows an unauthenticated network-reachable attacker to achieve arbitrary code execution on the server or client by sending a crafted pickle payload through the SendPolicyInstructions, SendObservations, or GetActions gRPC calls. The vulnerability has a CVSS score of 9.3 and is considered CRITICAL.

Vendor
Hugging Face
Product
LeRobot
CVSS
CRITICAL 9.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-23
Original CVE updated
2026-07-14
Advisory published
2026-04-23
Advisory updated
2026-07-14

Who should care

Users of LeRobot version 0.5.1 or earlier should be aware of this vulnerability and take steps to mitigate it. This includes verifying the version of LeRobot in use, applying patches or mitigations provided by the vendor, monitoring for suspicious activity on gRPC channels, and considering implementing additional security controls such as authentication and encryption for gRPC channels.

Technical summary

The vulnerability exists in the async inference pipeline of LeRobot, where pickle.loads() is used to deserialize data received over unauthenticated gRPC channels without TLS. This allows an unauthenticated network-reachable attacker to achieve arbitrary code execution on the server or client by sending a crafted pickle payload through the SendPolicyInstructions, SendObservations, or GetActions gRPC calls. The vulnerability has a CVSS score of 9.3 and is considered CRITICAL.

Defensive priority

High

Recommended defensive actions

  • Inventory and verify the version of LeRobot in use
  • Apply patches or mitigations provided by the vendor
  • Monitor for suspicious activity on gRPC channels
  • Consider implementing additional security controls such as authentication and encryption for gRPC channels
  • Review and update the configuration of LeRobot to ensure that it is not exposed to untrusted networks
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-04-23T20:16:13.903Z and was last modified on 2026-07-14T16:16:57.380Z. The NVD entry is currently Analyzed. This vulnerability affects LeRobot through version 0.5.1. The async inference pipeline uses pickle.loads() to deserialize data received over unauthenticated gRPC channels without TLS, allowing for arbitrary code execution. Users should verify their version and apply patches or mitigations provided by the vendor.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-04-23T20:16:13.903Z and has not been modified since then. The NVD entry is currently Analyzed.